Notes

Abstract:

Computed tomography contributions to public radiation exposure have increased with increasing examination prevalence and patient throughput. Organ dose has been suggested as the best metric for quantifying risks associated with computed tomography exposures for its duality in predicting both deterministic and stochastic effects. A Monte Carlo based software program providing prospective organ dose estimates from computed tomography examinations has been developed at the University of Florida. The program’s ability to account for tube current modulation and accurately report organ doses can be validated through experimental measurements. The goal of this work was to provide organ dose estimates from exposures delivered by a Toshiba Aquilion ONE computed tomography scanner using optically stimulated luminescent dosimeters within anthropomorphic phantoms. Fourteen chest-abdomen-pelvis examinations were conducted for 3 anthropomorphic phantoms: a reference 10-year-old hermaphrodite, 15-year-old female, and adult male with 49, 46, and 57 point measurement locations, respectively. Point doses were averaged across each organ to provide average organ doses for 15 organs (16 for the adult male with the addition of the prostate). Reported organ doses resemble values presented in Lindsay Sinclair’s dissertation work from measurements made within cadaveric subjects utilizing the same dosimetry system and CT scanner: ranging from 1.89% to 18.49% difference. In an initial comparison to software-reported organ doses within the adult male, average percent differences of 7.61% and 5.37% were observed at 120 kVp and 135 kVp, respectively.

General Note:

In the series University of Florida Digital Collections.

General Note:

Includes vita.

Bibliography:

Includes bibliographical references.

Source of Description:

Description based on online resource; title from PDF title page.

Source of Description:

This bibliographic record is available under the Creative Commons CC0 public domain dedication. The University of Florida Libraries, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.

Statement of Responsibility:

by Kayla R Ficarrotta.

Thesis:

Thesis (M.S.)--University of Florida, 2013.

Local:

Adviser: BOLCH,WESLEY EMMETT.

Local:

Co-adviser: HINTENLANG,DAVID ERIC.

Electronic Access:

RESTRICTED TO UF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE UNTIL 2014-12-31